Rotary grain-screen



D. PEASE, Jr.

Grain Winnower.

No. 7,744. B Patented '00:. 29, 1850.-

UNIED SAE PATENT OFFICE.

DAN PEASE, JR., OF FLOYD, NEW YORK.

ROTARY GRAIN-SCREEN.

Specification of Letters Patent No. 7,744, dated October 29, 1850.

To all whom it may concern Be it known that I, DAN PEASE, Jr., of Floyd,in the county of Oneida and State of New York, have invented a new anduseful Improvement in Rolling Screens.

I will first mention the difliculty attending the operation of therolling screen made in the usual way in order to show more clearly theremedial improvement. The diameter being the same all the way from oneend to the other when itrevolves with a motion that is right for thefine part of the screen it is much too fast for the coarse part, thebits of straw and other stuff that has more length than breadth that areintended to pass out at the end of the screen will be tumbled along orlifted up and fall endwise through the meshes of the wirecloth with thewheat, and to remedy this evil my improvement consists in the followingmode of construction: I make the fine part of the screen in the usualway and make the coarse part much less in diameter to reduce the motionas much as I conveniently can. At the end of the fine part of the screenI put in a head made of board that just fills it. To this head thecoarse part of the screen is attached, and by means of conductors beingattached to the opposite side of the head the grain (as the screenrolls) is brought from the fine part of the screen through the headint-o the coarse part which is much less in diameter and is made roundand smooth inside so as not to lift anything that is in it as itrevolves allowing bits of straw, &c., to remain as fiat as possible onthe bottom until they pass out at the end of the screen, it being setinclining for that purpose.

The description is as follows, reference being had to theannexed'drawings of the same making part of this specification.

Figure 1 is a perspective view of the screen. Fig. 2 is a view of thehead with the conductors and coarse part of the screen attached to it itbeing detached from the fine part thereof.

The same letters refer to like parts.

A is the fine part of the screen.

B is the coarse part.

C is the head that fills the end of the fine part of the screen with theconductors attached to one side and the coarse screen to the other. Whenput together the conductors come inside of the fine screen.

D is the conductors. They are made of thin sheet--iron and nailed to thehead. The sheet iron is so bent at angles as to have one part lie flaton the head for the purpose of nailing it thereto and then forming twosides to a conductor, the head being another, and one side is open. Theopen side goes forward as the screen revolves. They dip the grain at thebottom or when the outward end of the conductor is downward and as itrevolves so that the outward end is the highest the grain slides towardthe center of the head (though not in a direct line to the center forthe conductors are so put onto the head that the outward end standsforward of the inner end to make the grain slide with more east) wherethere is a hole through it at the end of each conductor through whichthe grain is directed into the coarse part of the screen which isattached to the other side of the head. The conductors at the inner endturn with an angle toward the head and a part of that end comes into thehole to direct the grain through the head.

E is a piece of sheet-iron bent around the same size as the coarse partof the screen which the grain first falls onto as it comes from theconductors. This is to prevent bits of straws, &c., from pitchingendwise through the meshes of the screen which it would do if the wirecloth was in place of the sheet iron.

h is the ribs that support the sheet iron and wire cloth. One end isconnected to the head and the other end is connected by small arms orspokes to the shaft beyond the end of the wire cloth. These ribs areoutside of the wire cloth, .so as to leave the inside smooth and round.

The grain enters the screen at F and by its inclined position androlling motion the grain is carried toward the other end where theconductors (as they revolve with the screen) dip it up and direct itinto the fall through and the straws, &c., to pass out small part forthe above mentioned purpose at the end. and substantially as abovedescribed.

I claim- The construction of a rolling screen con- DAN PEASE 5 sistingof a large and fine, and small and Witnesses:

coarse part in combination with conductors ANsoN LITTLE,

D, to carry the grain from the large to the ALEXANDER CoBURN.

